Interface module for a unit of an antenna distribution system, and antenna distribution system

An antenna distribution system comprising:

• at least one master unit;
• a plurality of remote units which are connected to the master unit;
• an interface module associated with each remote unit of the plurality, each interface module comprising:
• a first analog interface for forwarding and receiving communication signals from mobile terminals;
• a second interface for forwarding and receiving communication signals from the antenna distribution system;
• at least one signal path for forwarding the received communication signals between the first and second interfaces;
• a controllable digital unit in the signal path that is configured for digitizing incoming communication signals to digital signals and converting outgoing communication signals to analog signals, the digital unit being configured to evaluate characteristic signal parameters of the digital communication signals and select a subset of signals from the digital communication signals, the controllable digital unit further configured for forwarding the selected subset of signals;
• the master unit being configured to selectively drive the digital units of the remote units and to receive and forward the subset of signals selected.